Gimbal Is Sticks After Slight Crash

I gently hit a tree (yes, really ) about 8-10 high. There is no visible damage to the the drone. But since the crash the camera sticks a bit when going up or down. When it's powered off, the camera doesn't hang down anymore. The other axis is fine. There is no visible damage.

When it's first powered on, I get a gimbal error, as soon as I take off it goes away.